Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number V8500-643 found under Valve Solenoid by Valcor Engineering Corp. The National Stock Number assigned to this part is 4810000090450, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like V8500-643.